Mitsubishi Electric Mr.Slim PUHZ-RP35VHA3 Service Manual page 141

OPERATING PROCEDURE
7. Removing the 4-way valve coil (21S4), and LEV coil
(LEV(A), LEV(B))
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
[Removing the 4-way valve coil]
(3) Remove 4-way valve coil fixing screw (M4
(4) Remove the 4-way valve coil by sliding the coil toward you.
(5) Disconnect the connector 21S4 (green) on the controller
circuit board in the electrical parts box.
[Removing the LEV coil]
(3) Remove the LEV coil by sliding the coil
upward.
(4) Disconnect the connectors, LEV A (white) and LEV B (red),
on the controller circuit board in the electrical parts box.
8. Removing the 4-way valve
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Remove 3 valve bed fixing screws (4
valve and stop valve fixing screws (5
remove the valve bed.
(4) Remove 4 right side panel fixing screws (5
rear of the unit then remove the right side panel.
(5) Remove the 4-way valve coil. (See photo 7.)
(6) Recover refrigerant.
(7) Remove the welded part of 4-way valve.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by remov-
ing the right side panel.
Note 3: When installing the 4-way valve, cover it with a
wet cloth to prevent it from heating (120°C or more),
then braze the pipes so that the inside of pipes
are not oxidized.
9. Removing LEV
(1) Remove the service panel. (See figure 1.)
(2) Remove the top panel. (See figure 1.)
(3) Remove 3 valve bed fixing screws (4
valve and stop valve fixing screws (5
remove the valve bed.
(4) Remove 4 right side panel fixing screws (5
rear of the unit then remove the right side panel.
(5) Remove the LEV. (See photo 7.)
(6) Recover refrigerant.
(7) Remove the welded part of LEV.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by remov-
ing the right side panel.
Note 3: When installing the LEV, cover it with a wet cloth
to prevent it from heating (120°C or more), then
braze the pipes so that the inside of pipes are not
oxidized.
Photo 7
4-way valve coil
(21S4)
6).
4-way valve coil
fixing screw
Photo 8
10) and 4 ball
Charge plug
16) then
(High pressure)
10) in the
LEV coil
(LEV B)
10) and 4 ball
LEV
16) then
10) in the
141
PHOTOS
LEV coil (LEV A)
4-way valve
LEV coil
(LEV B)
LEV coil (LEV A)
LEV
Thermistor
<Outdoor
pipe>
(TH33)
4-way valve
Charge plug
(Low pressure)